The OnClientLoad client-side event occurs after RadListBox has been fully initialized on the client-side.

The event handler receives one parameter:

The listbox instance firing the event.

This event is helpful if you need to get the client-side instance of the listbox when it is embedded in other controls. Hook the OnClientLoad event and get the client-side instance of the listbox as demonstrated in the example below. This technique can be used to retrieve the RadListBox instance for use elsewhere.